It depends on how you plan to use them.
For positive single or multicatch sets I really like the ones from Fields Development Supply (
www.fieldsdevsupply.com). You mount the nose cone and then insert the appropriate trap into it. To switch out traps, just lift up on the retaining spring and slide the trap out then insert the replacement. What I appreciate about this system the most is unlike other models where you have to uninstall the screws in the mounting wings to take it down and swap it out the only attachment you need to worry about is the nose cone and that stays in place until the job is done.
For baited individual catch traps, I like the Tomahawk (
www.livetrap.com)5 x 5 x 18 mounted to the gutter with Fields spring loaded gutter hook. I prefer the spring loaded gutter hooks over the aluminum gutter hooks as you'll have issues with half round gutters or gutters that have too much of a roof overlap. I used to use the Safeguard 5 x 5 x 18 but they got to the point they wouldn't survive after the first catch without having to make repairs of some sort to. I just purchases a WCS (
www.shopwcs.com) 5 x 5 x 18 with 1/2 x 1/2 wire, and the AES (
www.aestraps.com) double catch traps but haven't been able to try them yet.
I've also used two models of the Comstock (
www.comstockcustomcage.com) squirrel traps (5 x 5 x 24 and 3 x 5 x 24). Both of these are flush mount capable, panless swing panel double spring loaded door traps. They are primarily single catch walk through traps but I can see where you could get doubles in the right situation. The 3 x 5 can sit in a gutter if the screws or spikes are far enough apart. Due to how they are manufactured, you cannot really use the spring loaded gutter hooks with the 5 x 5 or 6 x 6 panless swing panel traps so you'd have to have external anchors like the Fields aluminum gutter hook or screws/wire to hold them in place.
If you're looking specifically at chipmunks, my go to trap is the Safeguard 3 x 3 x 10 metal trap covered with mulch and baited. These take mice, voles, and chipmunks very quickly and keep them out of sight.